Engine.



L. SGHWITZER.

ENGINE.

APPLIOATION FILED JUNE 3, 1912.

Patented Oct. 6, 1914.

2 SHEETS-SHEET 1.

L. SGHWITZER.

ENGINE.

APPLIUATION FILED JUNE 3, 1912.

Patented Oct. 6, 1914.

2 SHEETS-SHEBT 2.

LOUIS SCHWI'IIZER, OF INDIANAPOLIS, INDIANA.

ENGINE.

i iaoss.

T0 at! whom it may concern Bejt known that L-Lonis Scr'nvrrznma citizenof Austria, (who has declared his intention-of becoming a citizen of the United States,). "residing at Indianapolis, in the county of Marion and State of Indiana, have invented a new and useful Engine, of which the following is a specification.

; Inthe construction of internal combus 'tionen'gines-of that type in'which the flow of gases is controlled by means of-a sleeve or sleeves lying between the piston and the cylinder, it is usual toclose the active end of xthecylinder, and the adjacent end or ends of the internal sleeve or Sleeves, with a head which is provided with an extension which projects into and fills the inner sleeve. Such a head may be-circulated therein and inoider that the clearance space within the fcylinderflmaybe sufliciently small and that spaikplugs of ordinary type may be used, it is customary and desirable to so form the closing head that its exposed portion has a deep pocket within it, substantially co-axial with the cylinder. In the practical use of engines of-this type in automobiles, it has been found thatthe deep pockets in the heads of the cylinders are likely to become filled or'partially filled with water, from exposure to the weather or during washing; also with sand or grit during use, in such manner as to materially interfere with the proper operation of the spark plugs. .Difliculty is also experienced in obtaining proper.

circulationof water through the chamber. of the head projection. When these pockets have foreign material in them, it is practicallyimpossible-to remove the spark plugs without getting such material in the cylin' ders.

The object of my present invention, therefore, is to so form the cylinder heads that they may be. readily associated with the cylinders and proper water circulation secured therethrough. to: thoroughly protect the pocketed cylinder heads and incidentally to produce-a heat exterior which may be readily 'k'ept cleaned; to provide means for read-' ily determining'the operative condition of .the spark plugs; and to provide such other improvements in details of construction as may be hereinafter pointed out.

The accompanylng drawings illustrate my invention.

Figure 1 is a plan in partial horizontal section of an engine embodying my inven- Specification of Letters Patent.

Application filed June 3, 1912.

Patented Oct. 6, 191a. Serial No. 701,229;

In the drawings, 10, 10 indicates cylinders which are arranged in pairs and in each of which is mounted a pair of valve sleeves 11, 11, of a common type, within the inner one of each pair of which is mounted a piston (not shown). The upper or active end of each cylinder 10 is closed by a head 12 which is provided with a central extension or projection 13 which is projected into and ,fits the inner-valve sleeve 11. Each head 12 is provided with an interior water chamber 14 and externally, at the top, is formed with a comparatively deep pocket 15 the bottom of which is perforated at 16 to receive the ordinary spark plug 17, the upper end of said spark plug being the usualungrounded terminal 18 to. which the usual lead wire 19 may be connected in an ordinary manner.

lChamber 1-'1 oi. head 12 communicates with the watenjacket 20 of its cylinder through an opening 20, as shown in Fig. 3, and discharges through a passage 41, in its side wall, to an outlet pipe As it is custom-- ary to arrange the cylinders of a multicylinder engine in pairs, I construct my cylinder heads 12 as rights and le'fts with one straight side 43, so that the straight sides of a pair may fit closely together and thus avoid the formation of a dirt-catching depression between the two heads of a pair of cylinders.

In order to thoroughly protect the pockets 15 fromthe entry of foreign substances, and thereby protect the spark plugs, I provide covers 21 which may be conveniently made of stamped sheet metal and are conveniently of such size as to cover the heads of two adjacent cylinders, the covers being also preferably of sufficient size to embrace the upper exposed ends of the bolts and nuts 22 by means of which the heads 12 are secured to their cylinders. The covers 21. thus present a smooth surface to which dirt will not readily adhere and which may be readily and quickly cleaned by wiping. Each cover 21 may be held in place'by any desired means as, for instance, by posts 25 carried .by the heads 12 and threaded at their upper ends, the threaded ends projecting through suitable openings in the cover and receiving the butterflynuts 25.-

By the construction above described, the spark plugs are, in a measure inaccessible and, therefore, in order that the operator may readily determine the operative condition of these plugs atany 'time,'I secure within each cover, a spring metal strip 26, the opposite ends of which are projected to points immediately above the terminals 18 of the adjacent spark plugs, and projecting through the cover and engaging the opposite ends of the strip 26 are push buttons 27, 27 preferably made of some insulating material, The ends of the strip 26 are normally out of contact with the spark plugs but, by pushing upon the proper push button 27, any desired spark plug may be grounded upon that side which is normally not grounded and that particular plug, in that manner may be thrown out of -commission. vVhen the engine is running and with the exhaust open, the operator may in this manner readily determine the conditions of the spark plugs.

In' order that the engine may present as neat .an external appearance as possible and in order to thoroughly protect the spank plug wiring, I bring the lead wires upwardly through a plpe 28, which, at its upper end, is transversely branched, as shown at 29, the ends 29 registering with openings 30 in the covers-21. By this arrangement, the Wires are thoroughly protected and do not form a lodging place for oil and dirt,

I claim as my invention:

1. The combination, with an internal combustion engine having a cvlinder head provided with a pocket in. its upper surface, of a spark plug arranged in the bottom of said pocket, a cover detachably secured to cover said pocket and spark plug, a grounded spark-plug-engaging member carriedby said cover and normally out of engagement with the spark plug, and an operating member engaging said sp'ark-plug-engaging member and manually engageable from the exterior of the cover.

2. The combination, with an internal combustion engine having a cylinder head provided with a pocket in its upper surface, of a spark plug arranged in the bottom of said pocket, a cover detachably secured to cover said pocket and spark plug, a grounded spark-plug-e'ngaging member normally out of engagement with the spark plug, and an operating member engaging said sparkplugeengaglng member and manually engageable from the exterior of the cover.

In witness whereof, I have hereuntoset my hand and seal at Indianapolis, Indiana, this 31st day of May, A. D. one thousand nine hundred and twelve.

LOUIS SCHNITZER. 

